This video is by Adrian McLaughlin, aka plasticraincoat1 on YouTube, who shows us one of the most magnificent examples of explosive polymerization ever. In the video, what appears to be about 1/2 tsp of p-nitroaniline (which is short for para-nitroaniline, which is also referred to as 4-nitroaniline) is treated with a few drops of concentrated sulfuric acid, in a ceramic dish, over a Bunsen burner flame.